Lathe



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LATHE.

Patented Sept. 8, 1885.

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UNITED STATES PATENT OFFICE.

JACKSON ORLANDO HAAS, OF HEPLER, PENNSYLVANIA.

LA TH E.

EPECIPICATION forming part of Letters Patent No. 325,832, dated September 8, 1885 Application filed June 28, 1885. (Model.)

To all whom zit may concern:

Be it known that I, J AOKSON ORLANDO HAAS, of Hepler, in the county of Schuylkill and State of Pennsylvania, have invented certain new and useful Improvements in Lathes, of which the following is a full, clear, and exact description.

The object of my invention is to provide a new andimproved lathe,which has two deadcenter plugs, between which the work is suspended.

The invention consists in the construction and arrangement of parts, as will be hereinafter fully described and claimed.

The invention also consists in various parts and details, hereinafter more fully set forth and described.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is alongitudinal vertical section through the head-stock of a lathe, showing my improvements. Fig. 2 is a front face view of the same; and Fig. 3 isa vertical cross section on the lines as w of Fig. 1, with the face-plate removed.

Heretofore lathes were provided with one dead-center in the form of the pointed center plug attached to the tail-stock, and with'a pointed center plug placed in either the face plate or the spindle of the head-stock and turning with the same, whereby the weight of the work suspended between the two pointed center plugs caused the face-plate or the spindle to run out of center, so that when the work was changed around between the two pointed center plugs it would be invariably found 'to be eccentric at the turned portion near the dead-center in the tail-stock.

My improvement obviates this difficulty by providing the lathe with two stationary center plugs, so that the face plate or spindle of the lathe is not affected by the weight of the work placed between the two stationary pointed center plugs.

The head A is mounted on the lathe-frame in the usual manner, and is provided with the B and B impart different speeds to the faceplate and B meshes into the gear-wheel K, keyed on the shaft K, which is connected by any suitable gearing with the screw or feedrod of the lathe.

The projection orhub Aof thehead-stock is provided in its center with the longitudinal conically shaped aperture A in which is placed the pointed center plug, 0, forming the dead-center in the head-stock A. The pointed center plug'in the tail-stock is of usual construction, and is not represented in the drawings.

The projection A is also provided with three or more wedge-shaped bolts, D,whieh take up the wear of the face-plate B, turning loosely on the projection A, by screwing up the nuts D on the outer ends of the bolts D.

To the inner end of the projection A is secured the disk E by bolts and nuts E. The disk E rests in a recess, B, in the face-plate B,which recess B and the disk E are covered up by the plate F, secured to the front of the face-plate B.

The face-plateB and the plate F are provided with the usual slots to receive the lathe-dogs and the bolts for fastening the work to the face-plate B.

The disk E is also provided with asmall hub, E, which projects through a corresponding aperture in the plate F, and is flush with the face-plate B.

To the head-stock A is secured the cover G, which fits partly around the gear-wheel B attach ed to the face-pl ate B, and has an annular ridge, b, fitting in an annular groove, 1), in theback of gear-wheel B". The cover G thus forms a back bearing for the gear-wheel Bfland thereby prevents the faceplate from wabbling and also protects the gear-wheel B from dust. Motion is imparted to the faceplate B by either the gear-wheels B or B", meshing in respective gear-wheels I I on shaft 1, which derives its motion in the usual manner from the counter-shaft. By shifting shaft I longitudinally its gear-wheels are engaged as required to change the speed of the face-plate.

Back gearing can be applied from the shaft I by proper and suitable devices.

Having thus described my invention, what I claim as new, and desire to secure by Letters,

Patent, is

1. The eo1nbination,with the head-stock A, center plug, 0, in combination with the face having the longitudinally-apertured hub A, plate B, provided with the gear-Wheels B, B of the plug 0, the head B, journaled on the and B, and the plate F, substantiallyas shown I 5 said hub and having the gears. B B B of and described.

5 Varying diameters, on its periphery, theshaft 3. I11 a lathe, the combination,with the hub K, the gear K thereon meshing with the gear A, having projection A, and the face-plate B, B, and the shifting gears Il", adaptedto mesh of the plate E, the cover G, and the bolts E,

with the gears B B", substantially as set forth. substantially as shown and described.

2. I n a lathe, the headstock A, provided JACKSON ORLANDO HAAS. :o with the projection or hub A, having the \Vitnesses:

aperture A the bolts D, the nuts D, the disk XVILLIAM ATKIN,

E, provided with the hub E and the pointed S. B. NEUGARD. 

